New treatment strategy Non-specific part; Traditional SRP to reduce the bacterial load and disrupt/destroy the biofilm, but reduce the size of "the window of opportunity" for re-infection by scaling /removing biofilms in all sites (healthy/not healthy) within 8 hours. All sites are scaled, healthy or diseased. Additional FDIS to reduce amount of bacteria in the oral cavity to levels possible to handle for the antibiotic to be used.